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Integrated Nutrient Management (INM), the use of natural and man-made source of plant nutrients is important due to its ability to sustain soil integrity and
improve fertility for sustainable crop production. In order to investigate the effect of INM on soil and maize yield, a field experiment was conducted at the Crop
Section of the Federal University of Technology, Akure (FUTA), Teaching and Research Farm for early and late season maize (TZB-SR) cultivation.
Composite soil sample of the site and poultry manure used in the experiment were analyzed before the commencement of experiment. Experimental design used
was a 2 x 3 x 3 factorial experiment in randomized complete block design with three replicates. Treatment comprises two levels of poultry manure (PM) (0 and
5 t ha-1), three levels of urea (U) (0, 50 and 100 kg ha-1) and three levels of single-superphosphate (SSP) (0, 30, and 60 kg ha-1) fertilizers. TZB-SR
maize was planted at 75 x 25 cm spacing and the cob harvested at maturity. At the end of the experiment, soil samples were collected from each plots and
analysed for chemical properties. The effect of PM application gave optimal soil chemical properties and yield of early and late maize cultivation at 5t ha-1
application level. Urea fertilizer effect was optimal at 100kg ha-1 and SSP effect optimal at 60kg ha-1 application level. The interaction of PM+U gave
optimal soil result and maize performance at 5t ha-1 PM+100kg ha-1 U, PM+SSP interaction gave optimal performance at 5t ha-1 PM+60kg ha-1 SSP.
U+SSP interaction gave optimal performance at 100kg ha-1 U+30kg ha-1 SSP, PM+U+SSP interaction gave optimal performance at 5t ha-1
PM+50kg ha-1 U+60kg ha-1 SSP and have the Highest value of OM (3.54%), available P (14.57mg kg-1), exch. K (0.68cmol kg-1), Ca (2.66cmol
kg-1), Mg (2.62cmol kg-1), CEC (5.11cmol kg-1), early maize cultivation cob yield (4.12t ha-1) and that of late maize cultivation (2.87t ha-1)